3553a4025a24bbb64753db89a66eaa9b648e62d4
[libav.git] / libavcodec / i386 / mathops.h
1 /*
2 * simple math operations
3 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #ifdef FRAC_BITS
23 # define MULL(ra, rb) \
24 ({ int rt, dummy; asm (\
25 "imull %3 \n\t"\
26 "shrdl %4, %%edx, %%eax \n\t"\
27 : "=a"(rt), "=d"(dummy)\
28 : "a" (ra), "rm" (rb), "i"(FRAC_BITS));\
29 rt; })
30 #endif
31
32 #define MULH(ra, rb) \
33 ({ int rt, dummy;\
34 asm ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" (ra), "rm" (rb));\
35 rt; })
36
37 #define MUL64(ra, rb) \
38 ({ int64_t rt;\
39 asm ("imull %2\n\t" : "=A"(rt) : "a" (ra), "g" (rb));\
40 rt; })
41